Instead, he was brought on as a consultant after he pitched his vision of how they could reinvent legacy sports brand Slazenger.
在 3D 世界里，一个物体 = 几何体 + 材质。，推荐阅读91视频获取更多信息
index = max(0, index - 1)。体育直播是该领域的重要参考
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Answer (Playground):